Kṣātra-dharma in Campaign and Battle: Protection, Purification, and the Ideal Warrior’s End (क्षात्रधर्मः—अभियानयुद्धे रक्षणदानशुद्धिः)
यथैव क्षेत्रनिर्याता निर्यात क्षेत्रमेव च । हिनस्ति धान्यं कक्ष च न च धान्यं विनश्यति
yathaiva kṣetraniryātā niryāta kṣetram eva ca | hinasti dhānyaṃ kakṣaṃ ca na ca dhānyaṃ vinaśyati ||
Bhīṣma said: Just as a farmer who weeds a field, while clearing the weeds, may also cut down some stalks of grain, yet the grain is not thereby destroyed—indeed, after weeding, the yield increases—so too in war, when a king’s soldiers strike with many kinds of weapons and kill those enemies who are fit to be slain, the king’s full expiation for that act is this: after the war, he should again promote the welfare and prosperity of the beings in his realm in every way.
भीष्म उवाच
Even when violence occurs in a justified war, the ruler bears ethical responsibility afterward: the true expiation is to restore and advance the welfare of the kingdom—protecting, nurturing, and enabling prosperity—just as weeding may incidentally cut some grain but ultimately supports a greater harvest.
In Bhīṣma’s instruction on rājadharma in the Śānti Parva, he uses an agricultural analogy: a farmer’s weeding may cause incidental loss yet serves the larger good; similarly, wartime killing of those deemed fit to be slain is framed as part of governance, and the king’s subsequent duty is comprehensive uplift of the realm.